Come up with sillier names for the binaries

I'm not entirely sure, but it looks like some people might not like
jokes about the Holocaust.

On a more serious note, the project has become more serious over
the 7 or so years of its existence.

1 files changed, 0 insertions, 2063 deletions

diff --git a/zyklonb.c b/zyklonb.c
deleted file mode 100644
index 08ffb1b..0000000
--- a/zyklonb.c
+++ /dev/null
@@ -1,2063 +0,0 @@
-/*
- * zyklonb.c: a modular IRC bot
- *
- * Copyright (c) 2014 - 2020, Přemysl Eric Janouch <p@janouch.name>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
-
-#include "config.h"
-#define PROGRAM_NAME "ZyklonB"
-
-#include "common.c"
-
-// --- Configuration (application-specific) ------------------------------------
-
-static struct simple_config_item g_config_table[] =
-{
-	{ "nickname",        "ZyklonB",         "IRC nickname"                   },
-	{ "username",        "bot",             "IRC user name"                  },
-	{ "realname",        "ZyklonB IRC bot", "IRC real name/e-mail"           },
-
-	{ "irc_host",        NULL,              "Address of the IRC server"      },
-	{ "irc_port",        "6667",            "Port of the IRC server"         },
-	{ "tls",             "off",             "Whether to use TLS"             },
-	{ "tls_cert",        NULL,              "Client TLS certificate (PEM)"   },
-	{ "tls_verify",      "on",              "Whether to verify certificates" },
-	{ "tls_ca_file",     NULL,              "OpenSSL CA bundle file"         },
-	{ "tls_ca_path",     NULL,              "OpenSSL CA bundle path"         },
-	{ "autojoin",        NULL,              "Channels to join on start"      },
-	{ "reconnect",       "on",              "Whether to reconnect on error"  },
-	{ "reconnect_delay", "5",               "Time between reconnecting"      },
-
-	{ "socks_host",      NULL,              "Address of a SOCKS 4a/5 proxy"  },
-	{ "socks_port",      "1080",            "SOCKS port number"              },
-	{ "socks_username",  NULL,              "SOCKS auth. username"           },
-	{ "socks_password",  NULL,              "SOCKS auth. password"           },
-
-	{ "prefix",          ":",               "The prefix for bot commands"    },
-	{ "admin",           NULL,              "Host mask for administrators"   },
-	{ "plugins",         NULL,              "The plugins to load on startup" },
-	{ "plugin_dir",      NULL,              "Plugin search path override"    },
-	{ "recover",         "on",              "Whether to re-launch on crash"  },
-
-	{ NULL,              NULL,              NULL                             }
-};
-
-// --- Application data --------------------------------------------------------
-
-struct plugin
-{
-	LIST_HEADER (struct plugin)
-	struct bot_context *ctx;            ///< Parent context
-
-	char *name;                         ///< Plugin identifier
-	pid_t pid;                          ///< PID of the plugin process
-
-	bool is_zombie;                     ///< Whether the child is a zombie
-	bool initialized;                   ///< Ready to exchange IRC messages
-	struct str queued_output;           ///< Output queued up until initialized
-
-	// Since we're doing non-blocking I/O, we need to queue up data so that
-	// we don't stall on plugins unnecessarily.
-
-	int read_fd;                        ///< The read end of the comm. pipe
-	int write_fd;                       ///< The write end of the comm. pipe
-
-	struct poller_fd read_event;        ///< Read FD event
-	struct poller_fd write_event;       ///< Write FD event
-
-	struct str read_buffer;             ///< Unprocessed input
-	struct str write_buffer;            ///< Output yet to be sent out
-};
-
-static struct plugin *
-plugin_new (void)
-{
-	struct plugin *self = xcalloc (1, sizeof *self);
-	self->pid = -1;
-	self->queued_output = str_make ();
-
-	self->read_fd = -1;
-	self->read_buffer = str_make ();
-	self->write_fd = -1;
-	self->write_buffer = str_make ();
-	return self;
-}
-
-static void
-plugin_destroy (struct plugin *self)
-{
-	soft_assert (self->pid == -1);
-	free (self->name);
-
-	str_free (&self->read_buffer);
-	if (!soft_assert (self->read_fd == -1))
-		xclose (self->read_fd);
-
-	str_free (&self->write_buffer);
-	if (!soft_assert (self->write_fd == -1))
-		xclose (self->write_fd);
-
-	if (!self->initialized)
-		str_free (&self->queued_output);
-
-	free (self);
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-struct bot_context
-{
-	struct str_map config;              ///< User configuration
-	regex_t *admin_re;                  ///< Regex to match our administrator
-	bool reconnect;                     ///< Whether to reconnect on conn. fail.
-	unsigned long reconnect_delay;      ///< Reconnect delay in seconds
-
-	int irc_fd;                         ///< Socket FD of the server
-	struct str read_buffer;             ///< Input yet to be processed
-	struct poller_fd irc_event;         ///< IRC FD event
-	bool irc_registered;                ///< Whether we may send messages now
-
-	struct poller_fd signal_event;      ///< Signal FD event
-	struct poller_timer ping_tmr;       ///< We should send a ping
-	struct poller_timer timeout_tmr;    ///< Connection seems to be dead
-	struct poller_timer reconnect_tmr;  ///< We should reconnect now
-
-	SSL_CTX *ssl_ctx;                   ///< SSL context
-	SSL *ssl;                           ///< SSL connection
-
-	struct plugin *plugins;             ///< Linked list of plugins
-	struct str_map plugins_by_name;     ///< Indexes @em plugins by their name
-
-	struct poller poller;               ///< Manages polled descriptors
-	bool quitting;                      ///< User requested quitting
-	bool polling;                       ///< The event loop is running
-};
-
-static void on_irc_ping_timeout (void *user_data);
-static void on_irc_timeout (void *user_data);
-static void on_irc_reconnect_timeout (void *user_data);
-
-static void
-bot_context_init (struct bot_context *self)
-{
-	self->config = str_map_make (free);
-	simple_config_load_defaults (&self->config, g_config_table);
-	self->admin_re = NULL;
-
-	self->irc_fd = -1;
-	self->read_buffer = str_make ();
-	self->irc_registered = false;
-
-	self->ssl = NULL;
-	self->ssl_ctx = NULL;
-
-	self->plugins = NULL;
-	self->plugins_by_name = str_map_make (NULL);
-
-	poller_init (&self->poller);
-	self->quitting = false;
-	self->polling = false;
-
-	self->timeout_tmr = poller_timer_make (&self->poller);
-	self->timeout_tmr.dispatcher = on_irc_timeout;
-	self->timeout_tmr.user_data = self;
-
-	self->ping_tmr = poller_timer_make (&self->poller);
-	self->ping_tmr.dispatcher = on_irc_ping_timeout;
-	self->ping_tmr.user_data = self;
-
-	self->reconnect_tmr = poller_timer_make (&self->poller);
-	self->reconnect_tmr.dispatcher = on_irc_reconnect_timeout;
-	self->reconnect_tmr.user_data = self;
-}
-
-static void
-bot_context_free (struct bot_context *self)
-{
-	str_map_free (&self->config);
-	if (self->admin_re)
-		regex_free (self->admin_re);
-	str_free (&self->read_buffer);
-
-	// TODO: terminate the plugins properly before this is called
-	LIST_FOR_EACH (struct plugin, link, self->plugins)
-		plugin_destroy (link);
-
-	if (self->irc_fd != -1)
-	{
-		poller_fd_reset (&self->irc_event);
-		xclose (self->irc_fd);
-	}
-	if (self->ssl)
-		SSL_free (self->ssl);
-	if (self->ssl_ctx)
-		SSL_CTX_free (self->ssl_ctx);
-
-	str_map_free (&self->plugins_by_name);
-	poller_free (&self->poller);
-}
-
-static void
-irc_shutdown (struct bot_context *ctx)
-{
-	// TODO: set a timer after which we cut the connection?
-	// Generally non-critical
-	if (ctx->ssl)
-		soft_assert (SSL_shutdown (ctx->ssl) != -1);
-	else
-		soft_assert (shutdown (ctx->irc_fd, SHUT_WR) == 0);
-}
-
-static void
-try_finish_quit (struct bot_context *ctx)
-{
-	if (ctx->quitting && ctx->irc_fd == -1 && !ctx->plugins)
-		ctx->polling = false;
-}
-
-static bool plugin_zombify (struct plugin *);
-
-static void
-initiate_quit (struct bot_context *ctx)
-{
-	// Initiate bringing down of the two things that block our shutdown:
-	// a/ the IRC socket, b/ our child processes:
-
-	for (struct plugin *plugin = ctx->plugins;
-		plugin; plugin = plugin->next)
-		plugin_zombify (plugin);
-	if (ctx->irc_fd != -1)
-		irc_shutdown (ctx);
-
-	ctx->quitting = true;
-	try_finish_quit (ctx);
-}
-
-static bool irc_send (struct bot_context *ctx,
-	const char *format, ...) ATTRIBUTE_PRINTF (2, 3);
-
-static bool
-irc_send (struct bot_context *ctx, const char *format, ...)
-{
-	va_list ap;
-
-	if (g_debug_mode)
-	{
-		fputs ("[IRC] <== \"", stderr);
-		va_start (ap, format);
-		vfprintf (stderr, format, ap);
-		va_end (ap);
-		fputs ("\"\n", stderr);
-	}
-
-	if (!soft_assert (ctx->irc_fd != -1))
-		return false;
-
-	va_start (ap, format);
-	struct str str = str_make ();
-	str_append_vprintf (&str, format, ap);
-	str_append (&str, "\r\n");
-	va_end (ap);
-
-	bool result = true;
-	if (ctx->ssl)
-	{
-		// TODO: call SSL_get_error() to detect if a clean shutdown has occured
-		ERR_clear_error ();
-		if (SSL_write (ctx->ssl, str.str, str.len) != (int) str.len)
-		{
-			print_debug ("%s: %s: %s", __func__, "SSL_write",
-				xerr_describe_error ());
-			result = false;
-		}
-	}
-	else if (write (ctx->irc_fd, str.str, str.len) != (ssize_t) str.len)
-	{
-		print_debug ("%s: %s: %s", __func__, "write", strerror (errno));
-		result = false;
-	}
-
-	str_free (&str);
-	return result;
-}
-
-static bool
-irc_get_boolean_from_config
-	(struct bot_context *ctx, const char *name, bool *value, struct error **e)
-{
-	const char *str = str_map_find (&ctx->config, name);
-	hard_assert (str != NULL);
-
-	if (set_boolean_if_valid (value, str))
-		return true;
-
-	return error_set (e, "invalid configuration value for `%s'", name);
-}
-
-static bool
-irc_initialize_ca_set (SSL_CTX *ssl_ctx, const char *file, const char *path,
-	struct error **e)
-{
-	ERR_clear_error ();
-
-	if (file || path)
-	{
-		if (SSL_CTX_load_verify_locations (ssl_ctx, file, path))
-			return true;
-
-		return error_set (e, "%s: %s",
-			"failed to set locations for the CA certificate bundle",
-			xerr_describe_error ());
-	}
-
-	if (!SSL_CTX_set_default_verify_paths (ssl_ctx))
-		return error_set (e, "%s: %s",
-			"couldn't load the default CA certificate bundle",
-			xerr_describe_error ());
-	return true;
-}
-
-static bool
-irc_initialize_ca (struct bot_context *ctx, struct error **e)
-{
-	const char *ca_file = str_map_find (&ctx->config, "tls_ca_file");
-	const char *ca_path = str_map_find (&ctx->config, "tls_ca_path");
-
-	char *full_file = ca_file
-		? resolve_filename (ca_file, resolve_relative_config_filename) : NULL;
-	char *full_path = ca_path
-		? resolve_filename (ca_path, resolve_relative_config_filename) : NULL;
-
-	bool ok = false;
-	if      (ca_file && !full_file)
-		error_set (e, "couldn't find the CA bundle file");
-	else if (ca_path && !full_path)
-		error_set (e, "couldn't find the CA bundle path");
-	else
-		ok = irc_initialize_ca_set (ctx->ssl_ctx, full_file, full_path, e);
-
-	free (full_file);
-	free (full_path);
-	return ok;
-}
-
-static bool
-irc_initialize_ssl_ctx (struct bot_context *ctx, struct error **e)
-{
-	// Disable deprecated protocols (see RFC 7568)
-	SSL_CTX_set_options (ctx->ssl_ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
-
-	bool verify;
-	if (!irc_get_boolean_from_config (ctx, "tls_verify", &verify, e))
-		return false;
-	SSL_CTX_set_verify (ctx->ssl_ctx,
-		verify ? SSL_VERIFY_PEER : SSL_VERIFY_NONE, NULL);
-
-	struct error *error = NULL;
-	if (!irc_initialize_ca (ctx, &error))
-	{
-		if (verify)
-		{
-			error_propagate (e, error);
-			return false;
-		}
-
-		// Only inform the user if we're not actually verifying
-		print_warning ("%s", error->message);
-		error_free (error);
-	}
-	return true;
-}
-
-static bool
-irc_initialize_tls (struct bot_context *ctx, struct error **e)
-{
-	const char *error_info = NULL;
-	ctx->ssl_ctx = SSL_CTX_new (SSLv23_client_method ());
-	if (!ctx->ssl_ctx)
-		goto error_ssl_1;
-	if (!irc_initialize_ssl_ctx (ctx, e))
-		goto error_ssl_2;
-
-	ctx->ssl = SSL_new (ctx->ssl_ctx);
-	if (!ctx->ssl)
-		goto error_ssl_2;
-
-	const char *tls_cert = str_map_find (&ctx->config, "tls_cert");
-	if (tls_cert)
-	{
-		char *path = resolve_filename
-			(tls_cert, resolve_relative_config_filename);
-		if (!path)
-			print_error ("%s: %s", "cannot open file", tls_cert);
-		// XXX: perhaps we should read the file ourselves for better messages
-		else if (!SSL_use_certificate_file (ctx->ssl, path, SSL_FILETYPE_PEM)
-			|| !SSL_use_PrivateKey_file (ctx->ssl, path, SSL_FILETYPE_PEM))
-			print_error ("%s: %s", "setting the TLS client certificate failed",
-				xerr_describe_error ());
-		free (path);
-	}
-
-	SSL_set_connect_state (ctx->ssl);
-	if (!SSL_set_fd (ctx->ssl, ctx->irc_fd))
-		goto error_ssl_3;
-	// Avoid SSL_write() returning SSL_ERROR_WANT_READ
-	SSL_set_mode (ctx->ssl, SSL_MODE_AUTO_RETRY);
-
-	switch (xssl_get_error (ctx->ssl, SSL_connect (ctx->ssl), &error_info))
-	{
-	case SSL_ERROR_NONE:
-		return true;
-	case SSL_ERROR_ZERO_RETURN:
-		error_info = "server closed the connection";
-	default:
-		break;
-	}
-
-error_ssl_3:
-	SSL_free (ctx->ssl);
-	ctx->ssl = NULL;
-error_ssl_2:
-	SSL_CTX_free (ctx->ssl_ctx);
-	ctx->ssl_ctx = NULL;
-error_ssl_1:
-	if (!error_info)
-		error_info = xerr_describe_error ();
-	return error_set (e, "%s: %s", "could not initialize TLS", error_info);
-}
-
-static bool
-irc_establish_connection (struct bot_context *ctx,
-	const char *host, const char *port, struct error **e)
-{
-	struct addrinfo gai_hints, *gai_result, *gai_iter;
-	memset (&gai_hints, 0, sizeof gai_hints);
-	gai_hints.ai_socktype = SOCK_STREAM;
-
-	int err = getaddrinfo (host, port, &gai_hints, &gai_result);
-	if (err)
-		return error_set (e, "%s: %s: %s", "connection failed",
-			"getaddrinfo", gai_strerror (err));
-
-	int sockfd;
-	for (gai_iter = gai_result; gai_iter; gai_iter = gai_iter->ai_next)
-	{
-		sockfd = socket (gai_iter->ai_family,
-			gai_iter->ai_socktype, gai_iter->ai_protocol);
-		if (sockfd == -1)
-			continue;
-		set_cloexec (sockfd);
-
-		int yes = 1;
-		soft_assert (setsockopt (sockfd, SOL_SOCKET, SO_KEEPALIVE,
-			&yes, sizeof yes) != -1);
-
-		const char *real_host = host;
-
-		// Let's try to resolve the address back into a real hostname;
-		// we don't really need this, so we can let it quietly fail
-		char buf[NI_MAXHOST];
-		err = getnameinfo (gai_iter->ai_addr, gai_iter->ai_addrlen,
-			buf, sizeof buf, NULL, 0, 0);
-		if (err)
-			print_debug ("%s: %s", "getnameinfo", gai_strerror (err));
-		else
-			real_host = buf;
-
-		// XXX: we shouldn't mix these statuses with `struct error'; choose 1!
-		char *address = format_host_port_pair (real_host, port);
-		print_status ("connecting to %s...", address);
-		free (address);
-
-		if (!connect (sockfd, gai_iter->ai_addr, gai_iter->ai_addrlen))
-			break;
-
-		xclose (sockfd);
-	}
-
-	freeaddrinfo (gai_result);
-
-	if (!gai_iter)
-		return error_set (e, "connection failed");
-
-	ctx->irc_fd = sockfd;
-	return true;
-}
-
-// --- Signals -----------------------------------------------------------------
-
-static int g_signal_pipe[2];            ///< A pipe used to signal... signals
-
-static struct strv
-	g_original_argv,                    ///< Original program arguments
-	g_recovery_env;                     ///< Environment for re-exec recovery
-
-/// Program termination has been requested by a signal
-static volatile sig_atomic_t g_termination_requested;
-
-/// Points to startup reason location within `g_recovery_environment'
-static char **g_startup_reason_location;
-/// The environment variable used to pass the startup reason when re-executing
-static const char g_startup_reason_str[] = "STARTUP_REASON";
-
-static void
-sigchld_handler (int signum)
-{
-	(void) signum;
-
-	int original_errno = errno;
-	// Just so that the read end of the pipe wakes up the poller.
-	// NOTE: Linux has signalfd() and eventfd(), and the BSD's have kqueue.
-	//   All of them are better than this approach, although platform-specific.
-	if (write (g_signal_pipe[1], "c", 1) == -1)
-		soft_assert (errno == EAGAIN);
-	errno = original_errno;
-}
-
-static void
-sigterm_handler (int signum)
-{
-	(void) signum;
-
-	g_termination_requested = true;
-
-	int original_errno = errno;
-	if (write (g_signal_pipe[1], "t", 1) == -1)
-		soft_assert (errno == EAGAIN);
-	errno = original_errno;
-}
-
-static void
-setup_signal_handlers (void)
-{
-	if (pipe (g_signal_pipe) == -1)
-		exit_fatal ("%s: %s", "pipe", strerror (errno));
-
-	set_cloexec (g_signal_pipe[0]);
-	set_cloexec (g_signal_pipe[1]);
-
-	// So that the pipe cannot overflow; it would make write() block within
-	// the signal handler, which is something we really don't want to happen.
-	// The same holds true for read().
-	set_blocking (g_signal_pipe[0], false);
-	set_blocking (g_signal_pipe[1], false);
-
-	struct sigaction sa;
-	sa.sa_flags = SA_RESTART;
-	sa.sa_handler = sigchld_handler;
-	sigemptyset (&sa.sa_mask);
-
-	if (sigaction (SIGCHLD, &sa, NULL) == -1)
-		exit_fatal ("sigaction: %s", strerror (errno));
-
-	signal (SIGPIPE, SIG_IGN);
-
-	sa.sa_handler = sigterm_handler;
-	if (sigaction (SIGINT, &sa, NULL) == -1
-	 || sigaction (SIGTERM, &sa, NULL) == -1)
-		exit_fatal ("sigaction: %s", strerror (errno));
-}
-
-static void
-translate_signal_info (int no, const char **name, int code, const char **reason)
-{
-	if (code == SI_USER)         *reason = "signal sent by kill()";
-	if (code == SI_QUEUE)        *reason = "signal sent by sigqueue()";
-
-	switch (no)
-	{
-	case SIGILL:
-		*name = "SIGILL";
-		if (code == ILL_ILLOPC)  *reason = "illegal opcode";
-		if (code == ILL_ILLOPN)  *reason = "illegal operand";
-		if (code == ILL_ILLADR)  *reason = "illegal addressing mode";
-		if (code == ILL_ILLTRP)  *reason = "illegal trap";
-		if (code == ILL_PRVOPC)  *reason = "privileged opcode";
-		if (code == ILL_PRVREG)  *reason = "privileged register";
-		if (code == ILL_COPROC)  *reason = "coprocessor error";
-		if (code == ILL_BADSTK)  *reason = "internal stack error";
-		break;
-	case SIGFPE:
-		*name = "SIGFPE";
-		if (code == FPE_INTDIV)  *reason = "integer divide by zero";
-		if (code == FPE_INTOVF)  *reason = "integer overflow";
-		if (code == FPE_FLTDIV)  *reason = "floating-point divide by zero";
-		if (code == FPE_FLTOVF)  *reason = "floating-point overflow";
-		if (code == FPE_FLTUND)  *reason = "floating-point underflow";
-		if (code == FPE_FLTRES)  *reason = "floating-point inexact result";
-		if (code == FPE_FLTINV)  *reason = "invalid floating-point operation";
-		if (code == FPE_FLTSUB)  *reason = "subscript out of range";
-		break;
-	case SIGSEGV:
-		*name = "SIGSEGV";
-		if (code == SEGV_MAPERR)
-			*reason = "address not mapped to object";
-		if (code == SEGV_ACCERR)
-			*reason = "invalid permissions for mapped object";
-		break;
-	case SIGBUS:
-		*name = "SIGBUS";
-		if (code == BUS_ADRALN)  *reason = "invalid address alignment";
-		if (code == BUS_ADRERR)  *reason = "nonexistent physical address";
-		if (code == BUS_OBJERR)  *reason = "object-specific hardware error";
-		break;
-	default:
-		*name = NULL;
-	}
-}
-
-static void
-recovery_handler (int signum, siginfo_t *info, void *context)
-{
-	(void) context;
-
-	// TODO: maybe try to force a core dump like this: if (fork() == 0) return;
-	// TODO: maybe we could even send "\r\nQUIT :reason\r\n" to the server. >_>
-	//   As long as we're not connected via TLS, that is.
-
-	const char *signal_name = NULL, *reason = NULL;
-	translate_signal_info (signum, &signal_name, info->si_code, &reason);
-
-	char buf[128], numbuf[8];
-	if (!signal_name)
-	{
-		snprintf (numbuf, sizeof numbuf, "%d", signum);
-		signal_name = numbuf;
-	}
-
-	if (reason)
-		snprintf (buf, sizeof buf, "%s=%s: %s: %s", g_startup_reason_str,
-			"signal received", signal_name, reason);
-	else
-		snprintf (buf, sizeof buf, "%s=%s: %s", g_startup_reason_str,
-			"signal received", signal_name);
-	*g_startup_reason_location = buf;
-
-	// Avoid annoying resource intensive infinite loops by sleeping for a bit
-	(void) sleep (1);
-
-	// TODO: maybe pregenerate the path, see the following for some other ways
-	//   that would be illegal to do from within a signal handler:
-	//     http://stackoverflow.com/a/1024937
-	//     http://stackoverflow.com/q/799679
-	//   Especially if we change the current working directory in the program.
-	//
-	//   Note that I can just overwrite g_orig_argv[0].
-
-	// NOTE: our children will read EOF on the read ends of their pipes as a
-	//   a result of O_CLOEXEC.  That should be enough to make them terminate.
-
-	char **argv = g_original_argv.vector, **argp = g_recovery_env.vector;
-	execve ("/proc/self/exe",        argv, argp);  // Linux
-	execve ("/proc/curproc/file",    argv, argp);  // BSD
-	execve ("/proc/curproc/exe",     argv, argp);  // BSD
-	execve ("/proc/self/path/a.out", argv, argp);  // Solaris
-	execve (argv[0],                 argv, argp);  // unreliable fallback
-
-	// Let's just crash
-	perror ("execve");
-	signal (signum, SIG_DFL);
-	raise (signum);
-}
-
-static void
-prepare_recovery_environment (void)
-{
-	g_recovery_env = strv_make ();
-	strv_append_vector (&g_recovery_env, environ);
-
-	// Prepare a location within the environment where we will put the startup
-	// (or maybe rather restart) reason in case of an irrecoverable error.
-	char **iter;
-	for (iter = g_recovery_env.vector; *iter; iter++)
-	{
-		const size_t len = sizeof g_startup_reason_str - 1;
-		if (!strncmp (*iter, g_startup_reason_str, len) && (*iter)[len] == '=')
-			break;
-	}
-
-	if (*iter)
-		g_startup_reason_location = iter;
-	else
-	{
-		g_startup_reason_location = g_recovery_env.vector + g_recovery_env.len;
-		strv_append (&g_recovery_env, "");
-	}
-}
-
-static bool
-setup_recovery_handler (struct bot_context *ctx, struct error **e)
-{
-	bool recover;
-	if (!irc_get_boolean_from_config (ctx, "recover", &recover, e))
-		return false;
-	if (!recover)
-		return true;
-
-	// Make sure these signals aren't blocked, otherwise we would be unable
-	// to handle them, making the critical conditions fatal.
-	sigset_t mask;
-	sigemptyset (&mask);
-	sigaddset (&mask, SIGSEGV);
-	sigaddset (&mask, SIGBUS);
-	sigaddset (&mask, SIGFPE);
-	sigaddset (&mask, SIGILL);
-	sigprocmask (SIG_UNBLOCK, &mask, NULL);
-
-	struct sigaction sa;
-	sa.sa_flags = SA_SIGINFO;
-	sa.sa_sigaction = recovery_handler;
-	sigemptyset (&sa.sa_mask);
-
-	prepare_recovery_environment ();
-
-	// TODO: also handle SIGABRT... or avoid doing abort() in the first place?
-	if (sigaction (SIGSEGV, &sa, NULL) == -1
-	 || sigaction (SIGBUS,  &sa, NULL) == -1
-	 || sigaction (SIGFPE,  &sa, NULL) == -1
-	 || sigaction (SIGILL,  &sa, NULL) == -1)
-		print_error ("sigaction: %s", strerror (errno));
-	return true;
-}
-
-// --- Plugins -----------------------------------------------------------------
-
-/// The name of the special IRC command for interprocess communication
-static const char *plugin_ipc_command = "ZYKLONB";
-
-static struct plugin *
-plugin_find_by_pid (struct bot_context *ctx, pid_t pid)
-{
-	struct plugin *iter;
-	for (iter = ctx->plugins; iter; iter = iter->next)
-		if (iter->pid == pid)
-			return iter;
-	return NULL;
-}
-
-static bool
-plugin_zombify (struct plugin *plugin)
-{
-	if (plugin->is_zombie)
-		return false;
-
-	// FIXME: make sure that we don't remove entries from the poller while we
-	//   still may have stuff to read; maybe just check that the read pipe is
-	//   empty before closing it... and then on EOF check if `pid == -1' and
-	//   only then dispose of it (it'd be best to simulate that both of these
-	//   cases may happen).
-	poller_fd_reset (&plugin->write_event);
-
-	// TODO: try to flush the write buffer (non-blocking)?
-
-	// The plugin should terminate itself after it receives EOF.
-	xclose (plugin->write_fd);
-	plugin->write_fd = -1;
-
-	// Make it a pseudo-anonymous zombie.  In this state we process any
-	// remaining commands it attempts to send to us before it finally dies.
-	str_map_set (&plugin->ctx->plugins_by_name, plugin->name, NULL);
-	plugin->is_zombie = true;
-
-	// TODO: wait a few seconds and then send SIGKILL to the plugin
-	return true;
-}
-
-static void
-on_plugin_writable (const struct pollfd *fd, struct plugin *plugin)
-{
-	struct str *buf = &plugin->write_buffer;
-	size_t written_total = 0;
-
-	if (fd->revents & ~(POLLOUT | POLLHUP | POLLERR))
-		print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
-	while (written_total != buf->len)
-	{
-		ssize_t n_written = write (fd->fd, buf->str + written_total,
-			buf->len - written_total);
-
-		if (n_written < 0)
-		{
-			if (errno == EAGAIN)
-				break;
-			if (errno == EINTR)
-				continue;
-
-			soft_assert (errno == EPIPE);
-			// Zombies shouldn't get dispatched for writability
-			hard_assert (!plugin->is_zombie);
-
-			print_debug ("%s: %s", "write", strerror (errno));
-			print_error ("failure on writing to plugin `%s',"
-				" therefore I'm unloading it", plugin->name);
-			plugin_zombify (plugin);
-			break;
-		}
-
-		// This may be equivalent to EAGAIN on some implementations
-		if (n_written == 0)
-			break;
-
-		written_total += n_written;
-	}
-
-	if (written_total != 0)
-		str_remove_slice (buf, 0, written_total);
-
-	if (buf->len == 0)
-		// Everything has been written, there's no need to end up in here again
-		poller_fd_reset (&plugin->write_event);
-}
-
-static void
-plugin_queue_write (struct plugin *plugin)
-{
-	if (plugin->is_zombie)
-		return;
-
-	// Don't let the write buffer grow indefinitely.  If there's a ton of data
-	// waiting to be processed by the plugin, it usually means there's something
-	// wrong with it (such as someone stopping the process).
-	if (plugin->write_buffer.len >= (1 << 20))
-	{
-		print_warning ("plugin `%s' does not seem to process messages fast"
-			" enough, I'm unloading it", plugin->name);
-		plugin_zombify (plugin);
-		return;
-	}
-	poller_fd_set (&plugin->write_event, POLLOUT);
-}
-
-static void
-plugin_send (struct plugin *plugin, const char *format, ...)
-	ATTRIBUTE_PRINTF (2, 3);
-
-static void
-plugin_send (struct plugin *plugin, const char *format, ...)
-{
-	va_list ap;
-
-	if (g_debug_mode)
-	{
-		fprintf (stderr, "[%s] <-- \"", plugin->name);
-		va_start (ap, format);
-		vfprintf (stderr, format, ap);
-		va_end (ap);
-		fputs ("\"\n", stderr);
-	}
-
-	va_start (ap, format);
-	str_append_vprintf (&plugin->write_buffer, format, ap);
-	va_end (ap);
-	str_append (&plugin->write_buffer, "\r\n");
-
-	plugin_queue_write (plugin);
-}
-
-static void
-plugin_process_ipc (struct plugin *plugin, const struct irc_message *msg)
-{
-	// Replies are sent in the order in which they came in, so there's
-	// no need to attach a special identifier to them.  It might be
-	// desirable in some cases, though.
-
-	if (msg->params.len < 1)
-		return;
-
-	const char *command = msg->params.vector[0];
-	if (!plugin->initialized && !strcasecmp (command, "register"))
-	{
-		// Register for relaying of IRC traffic
-		plugin->initialized = true;
-
-		// Flush any queued up traffic here.  The point of queuing it in
-		// the first place is so that we don't have to wait for plugin
-		// initialization during startup.
-		//
-		// Note that if we start filtering data coming to the plugins e.g.
-		// based on what it tells us upon registration, we might need to
-		// filter `queued_output' as well.
-		str_append_str (&plugin->write_buffer, &plugin->queued_output);
-		str_free (&plugin->queued_output);
-
-		// NOTE: this may trigger the buffer length check
-		plugin_queue_write (plugin);
-	}
-	else if (!strcasecmp (command, "get_config"))
-	{
-		if (msg->params.len < 2)
-			return;
-
-		const char *value =
-			str_map_find (&plugin->ctx->config, msg->params.vector[1]);
-		// TODO: escape the value (although there's no need to ATM)
-		plugin_send (plugin, "%s :%s",
-			plugin_ipc_command, value ? value : "");
-	}
-	else if (!strcasecmp (command, "print"))
-	{
-		if (msg->params.len < 2)
-			return;
-
-		printf ("%s\n", msg->params.vector[1]);
-	}
-}
-
-static void
-plugin_process_message (const struct irc_message *msg,
-	const char *raw, void *user_data)
-{
-	struct plugin *plugin = user_data;
-	struct bot_context *ctx = plugin->ctx;
-
-	if (g_debug_mode)
-		fprintf (stderr, "[%s] --> \"%s\"\n", plugin->name, raw);
-
-	if (!strcasecmp (msg->command, plugin_ipc_command))
-		plugin_process_ipc (plugin, msg);
-	else if (plugin->initialized && ctx->irc_registered)
-	{
-		// Pass everything else through to the IRC server
-		// XXX: when the server isn't ready yet, these messages get silently
-		//   discarded, which shouldn't pose a problem most of the time.
-		//   Perhaps we could send a "connected" notification on `register'
-		//   if `irc_ready' is true, or after it becomes true later, so that
-		//   plugins know when to start sending unprovoked IRC messages.
-		// XXX: another case is when the connection gets interrupted and the
-		//   plugin tries to send something back while we're reconnecting.
-		//   For that we might set up a global buffer that gets flushed out
-		//   after `irc_ready' becomes true.  Note that there is always some
-		//   chance of messages getting lost without us even noticing it.
-		irc_send (ctx, "%s", raw);
-	}
-}
-
-static void
-on_plugin_readable (const struct pollfd *fd, struct plugin *plugin)
-{
-	if (fd->revents & ~(POLLIN | POLLHUP | POLLERR))
-		print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
-	// TODO: see if I can reuse irc_fill_read_buffer()
-	struct str *buf = &plugin->read_buffer;
-	while (true)
-	{
-		str_reserve (buf, 512 + 1);
-		ssize_t n_read = read (fd->fd, buf->str + buf->len,
-			buf->alloc - buf->len - 1);
-
-		if (n_read < 0)
-		{
-			if (errno == EAGAIN)
-				break;
-			if (soft_assert (errno == EINTR))
-				continue;
-
-			if (!plugin->is_zombie)
-			{
-				print_error ("failure on reading from plugin `%s',"
-					" therefore I'm unloading it", plugin->name);
-				plugin_zombify (plugin);
-			}
-			return;
-		}
-
-		// EOF; hopefully it will die soon (maybe it already has)
-		if (n_read == 0)
-			break;
-
-		buf->str[buf->len += n_read] = '\0';
-		if (buf->len >= (1 << 20))
-		{
-			// XXX: this isn't really the best flood prevention mechanism,
-			//   but it wasn't even supposed to be one.
-			if (plugin->is_zombie)
-			{
-				print_error ("a zombie of plugin `%s' is trying to flood us,"
-					" therefore I'm killing it", plugin->name);
-				kill (plugin->pid, SIGKILL);
-			}
-			else
-			{
-				print_error ("plugin `%s' seems to spew out data frantically,"
-					" therefore I'm unloading it", plugin->name);
-				plugin_zombify (plugin);
-			}
-			return;
-		}
-	}
-
-	irc_process_buffer (buf, plugin_process_message, plugin);
-}
-
-static bool
-is_valid_plugin_name (const char *name)
-{
-	if (!*name)
-		return false;
-	for (const char *p = name; *p; p++)
-		if (!isgraph (*p) || *p == '/')
-			return false;
-	return true;
-}
-
-static char *
-plugin_resolve_relative_filename (const char *filename)
-{
-	struct strv paths = strv_make ();
-	get_xdg_data_dirs (&paths);
-	char *result = resolve_relative_filename_generic
-		(&paths, PROGRAM_NAME "/plugins/", filename);
-	strv_free (&paths);
-	return result;
-}
-
-static struct plugin *
-plugin_launch (struct bot_context *ctx, const char *name, struct error **e)
-{
-	char *path = NULL;
-	const char *plugin_dir = str_map_find (&ctx->config, "plugin_dir");
-	if (plugin_dir)
-	{
-		// resolve_relative_filename_generic() won't accept relative paths,
-		// so just keep the old behaviour and expect the file to exist.
-		// We could use resolve_filename() on "plugin_dir" with paths=getcwd().
-		path = xstrdup_printf ("%s/%s", plugin_dir, name);
-	}
-	else if (!(path = plugin_resolve_relative_filename (name)))
-	{
-		error_set (e, "plugin not found");
-		goto fail_0;
-	}
-
-	int stdin_pipe[2];
-	if (pipe (stdin_pipe) == -1)
-	{
-		error_set (e, "%s: %s", "pipe", strerror (errno));
-		goto fail_0;
-	}
-
-	int stdout_pipe[2];
-	if (pipe (stdout_pipe) == -1)
-	{
-		error_set (e, "%s: %s", "pipe", strerror (errno));
-		goto fail_1;
-	}
-
-	struct str work_dir = str_make ();
-	get_xdg_home_dir (&work_dir, "XDG_DATA_HOME", ".local/share");
-	str_append_printf (&work_dir, "/%s", PROGRAM_NAME);
-
-	if (!mkdir_with_parents (work_dir.str, e))
-		goto fail_2;
-
-	set_cloexec (stdin_pipe[1]);
-	set_cloexec (stdout_pipe[0]);
-
-	pid_t pid = fork ();
-	if (pid == -1)
-	{
-		error_set (e, "%s: %s", "fork", strerror (errno));
-		goto fail_2;
-	}
-
-	if (pid == 0)
-	{
-		// Redirect the child's stdin and stdout to the pipes
-		if (dup2 (stdin_pipe[0], STDIN_FILENO) == -1
-		 || dup2 (stdout_pipe[1], STDOUT_FILENO) == -1)
-		{
-			print_error ("%s: %s: %s", "failed to load the plugin",
-				"dup2", strerror (errno));
-			_exit (EXIT_FAILURE);
-		}
-		if (chdir (work_dir.str))
-		{
-			print_error ("%s: %s: %s", "failed to load the plugin",
-				"chdir", strerror (errno));
-			_exit (EXIT_FAILURE);
-		}
-
-		xclose (stdin_pipe[0]);
-		xclose (stdout_pipe[1]);
-
-		// Restore some of the signal handling
-		signal (SIGPIPE, SIG_DFL);
-
-		char *argv[] = { path, NULL };
-		execve (argv[0], argv, environ);
-
-		// We will collect the failure later via SIGCHLD
-		print_error ("%s: %s: %s", "failed to load the plugin",
-			"exec", strerror (errno));
-		_exit (EXIT_FAILURE);
-	}
-
-	str_free (&work_dir);
-	free (path);
-
-	xclose (stdin_pipe[0]);
-	xclose (stdout_pipe[1]);
-
-	struct plugin *plugin = plugin_new ();
-	plugin->ctx = ctx;
-	plugin->pid = pid;
-	plugin->name = xstrdup (name);
-	plugin->read_fd = stdout_pipe[0];
-	plugin->write_fd = stdin_pipe[1];
-	return plugin;
-
-fail_2:
-	str_free (&work_dir);
-	xclose (stdout_pipe[0]);
-	xclose (stdout_pipe[1]);
-fail_1:
-	xclose (stdin_pipe[0]);
-	xclose (stdin_pipe[1]);
-fail_0:
-	free (path);
-	return NULL;
-}
-
-static bool
-plugin_load (struct bot_context *ctx, const char *name, struct error **e)
-{
-	if (!is_valid_plugin_name (name))
-		return error_set (e, "invalid plugin name");
-	if (str_map_find (&ctx->plugins_by_name, name))
-		return error_set (e, "the plugin has already been loaded");
-
-	struct plugin *plugin;
-	if (!(plugin = plugin_launch (ctx, name, e)))
-		return false;
-
-	set_blocking (plugin->read_fd, false);
-	set_blocking (plugin->write_fd, false);
-
-	plugin->read_event = poller_fd_make (&ctx->poller, plugin->read_fd);
-	plugin->read_event.dispatcher = (poller_fd_fn) on_plugin_readable;
-	plugin->read_event.user_data = plugin;
-
-	plugin->write_event = poller_fd_make (&ctx->poller, plugin->write_fd);
-	plugin->write_event.dispatcher = (poller_fd_fn) on_plugin_writable;
-	plugin->write_event.user_data = plugin;
-
-	LIST_PREPEND (ctx->plugins, plugin);
-	str_map_set (&ctx->plugins_by_name, name, plugin);
-
-	poller_fd_set (&plugin->read_event, POLLIN);
-	return true;
-}
-
-static bool
-plugin_unload (struct bot_context *ctx, const char *name, struct error **e)
-{
-	struct plugin *plugin = str_map_find (&ctx->plugins_by_name, name);
-
-	if (!plugin)
-		return error_set (e, "no such plugin is loaded");
-
-	plugin_zombify (plugin);
-
-	// TODO: add a `kill zombies' command to forcefully get rid of processes
-	//   that do not understand the request.
-	return true;
-}
-
-static void
-plugin_load_all_from_config (struct bot_context *ctx)
-{
-	const char *plugin_list = str_map_find (&ctx->config, "plugins");
-	if (!plugin_list)
-		return;
-
-	struct strv plugins = strv_make ();
-	cstr_split (plugin_list, ",", true, &plugins);
-	for (size_t i = 0; i < plugins.len; i++)
-	{
-		char *name = cstr_strip_in_place (plugins.vector[i], " ");
-
-		struct error *e = NULL;
-		if (!plugin_load (ctx, name, &e))
-		{
-			print_error ("plugin `%s' failed to load: %s", name, e->message);
-			error_free (e);
-		}
-	}
-
-	strv_free (&plugins);
-}
-
-// --- Main program ------------------------------------------------------------
-
-static bool
-parse_bot_command (const char *s, const char *command, const char **following)
-{
-	size_t command_len = strlen (command);
-	if (strncasecmp (s, command, command_len))
-		return false;
-	s += command_len;
-
-	// Expect a word boundary, so that we don't respond to invalid things
-	if (isalnum (*s))
-		return false;
-
-	// Ignore any initial spaces; the rest is the command's argument
-	while (isblank (*s))
-		s++;
-	*following = s;
-	return true;
-}
-
-static void
-split_bot_command_argument_list (const char *arguments, struct strv *out)
-{
-	cstr_split (arguments, ",", true, out);
-	for (size_t i = 0; i < out->len; )
-	{
-		if (!*cstr_strip_in_place (out->vector[i], " \t"))
-			strv_remove (out, i);
-		else
-			i++;
-	}
-}
-
-static bool
-is_private_message (const struct irc_message *msg)
-{
-	hard_assert (msg->params.len);
-	return !strchr ("#&+!", *msg->params.vector[0]);
-}
-
-static bool
-is_sent_by_admin (struct bot_context *ctx, const struct irc_message *msg)
-{
-	// No administrator set -> everyone is an administrator
-	if (!ctx->admin_re)
-		return true;
-	return regexec (ctx->admin_re, msg->prefix, 0, NULL, 0) != REG_NOMATCH;
-}
-
-static void respond_to_user (struct bot_context *ctx, const struct
-	irc_message *msg, const char *format, ...) ATTRIBUTE_PRINTF (3, 4);
-
-static void
-respond_to_user (struct bot_context *ctx, const struct irc_message *msg,
-	const char *format, ...)
-{
-	if (!soft_assert (msg->prefix && msg->params.len))
-		return;
-
-	char nick[strcspn (msg->prefix, "!") + 1];
-	strncpy (nick, msg->prefix, sizeof nick - 1);
-	nick[sizeof nick - 1] = '\0';
-
-	va_list ap;
-	struct str text = str_make ();
-	va_start (ap, format);
-	str_append_vprintf (&text, format, ap);
-	va_end (ap);
-
-	if (is_private_message (msg))
-		irc_send (ctx, "PRIVMSG %s :%s", nick, text.str);
-	else
-		irc_send (ctx, "PRIVMSG %s :%s: %s",
-			msg->params.vector[0], nick, text.str);
-
-	str_free (&text);
-}
-
-static void
-process_plugin_load (struct bot_context *ctx,
-	const struct irc_message *msg, const char *name)
-{
-	struct error *e = NULL;
-	if (plugin_load (ctx, name, &e))
-		respond_to_user (ctx, msg, "plugin `%s' queued for loading", name);
-	else
-	{
-		respond_to_user (ctx, msg, "plugin `%s' could not be loaded: %s",
-			name, e->message);
-		error_free (e);
-	}
-}
-
-static void
-process_plugin_unload (struct bot_context *ctx,
-	const struct irc_message *msg, const char *name)
-{
-	struct error *e = NULL;
-	if (plugin_unload (ctx, name, &e))
-		respond_to_user (ctx, msg, "plugin `%s' unloaded", name);
-	else
-	{
-		respond_to_user (ctx, msg, "plugin `%s' could not be unloaded: %s",
-			name, e->message);
-		error_free (e);
-	}
-}
-
-static void
-process_plugin_reload (struct bot_context *ctx,
-	const struct irc_message *msg, const char *name)
-{
-	// XXX: we might want to wait until the plugin terminates before we try
-	//   to reload it (so that it can save its configuration or whatever)
-
-	// So far the only error that can occur is that the plugin hasn't been
-	// loaded, which in this case doesn't really matter.
-	plugin_unload (ctx, name, NULL);
-
-	process_plugin_load (ctx, msg, name);
-}
-
-static char *
-make_status_report (struct bot_context *ctx)
-{
-	struct str report = str_make ();
-	const char *reason = getenv (g_startup_reason_str);
-	if (!reason)
-		reason = "launched normally";
-	str_append_printf (&report, "\x02startup reason:\x0f %s", reason);
-
-	size_t zombies = 0;
-	const char *prepend = "; \x02plugins:\x0f ";
-	for (struct plugin *plugin = ctx->plugins; plugin; plugin = plugin->next)
-	{
-		if (plugin->is_zombie)
-			zombies++;
-		else
-		{
-			str_append_printf (&report, "%s%s", prepend, plugin->name);
-			prepend = ", ";
-		}
-	}
-	if (!ctx->plugins)
-		str_append_printf (&report, "%s\x02none\x0f", prepend);
-
-	str_append_printf (&report, "; \x02zombies:\x0f %zu", zombies);
-	return str_steal (&report);
-}
-
-static void
-process_privmsg (struct bot_context *ctx, const struct irc_message *msg)
-{
-	if (!is_sent_by_admin (ctx, msg))
-		return;
-	if (msg->params.len < 2)
-		return;
-
-	const char *prefix = str_map_find (&ctx->config, "prefix");
-	hard_assert (prefix != NULL);  // We have a default value for this
-
-	// For us to recognize the command, it has to start with the prefix,
-	// with the exception of PM's sent directly to us.
-	const char *text = msg->params.vector[1];
-	if (!strncmp (text, prefix, strlen (prefix)))
-		text += strlen (prefix);
-	else if (!is_private_message (msg))
-		return;
-
-	const char *following;
-	struct strv list = strv_make ();
-
-	if (parse_bot_command (text, "quote", &following))
-		// This seems to replace tons of random stupid commands
-		irc_send (ctx, "%s", following);
-	else if (parse_bot_command (text, "quit", &following))
-	{
-		// We actually need this command (instead of just `quote') because we
-		// could try to reconnect to the server automatically otherwise.
-		if (*following)
-			irc_send (ctx, "QUIT :%s", following);
-		else
-			irc_send (ctx, "QUIT");
-		initiate_quit (ctx);
-	}
-	else if (parse_bot_command (text, "status", &following))
-	{
-		char *report = make_status_report (ctx);
-		respond_to_user (ctx, msg, "%s", report);
-		free (report);
-	}
-	else if (parse_bot_command (text, "load", &following))
-	{
-		split_bot_command_argument_list (following, &list);
-		for (size_t i = 0; i < list.len; i++)
-			process_plugin_load (ctx, msg, list.vector[i]);
-	}
-	else if (parse_bot_command (text, "reload", &following))
-	{
-		split_bot_command_argument_list (following, &list);
-		for (size_t i = 0; i < list.len; i++)
-			process_plugin_reload (ctx, msg, list.vector[i]);
-	}
-	else if (parse_bot_command (text, "unload", &following))
-	{
-		split_bot_command_argument_list (following, &list);
-		for (size_t i = 0; i < list.len; i++)
-			process_plugin_unload (ctx, msg, list.vector[i]);
-	}
-
-	strv_free (&list);
-}
-
-static void
-irc_forward_message_to_plugins (struct bot_context *ctx, const char *raw)
-{
-	// For consistency with plugin_process_message()
-	if (!ctx->irc_registered)
-		return;
-
-	for (struct plugin *plugin = ctx->plugins;
-		 plugin; plugin = plugin->next)
-	{
-		if (plugin->is_zombie)
-			continue;
-
-		if (plugin->initialized)
-			plugin_send (plugin, "%s", raw);
-		else
-			// TODO: make sure that this buffer doesn't get too large either
-			str_append_printf (&plugin->queued_output, "%s\r\n", raw);
-	}
-}
-
-static void
-irc_process_message (const struct irc_message *msg,
-	const char *raw, void *user_data)
-{
-	struct bot_context *ctx = user_data;
-	if (g_debug_mode)
-		fprintf (stderr, "[%s] ==> \"%s\"\n", "IRC", raw);
-
-	// This should be as minimal as possible, I don't want to have the whole bot
-	// written in C, especially when I have this overengineered plugin system.
-	// Therefore the very basic functionality only.
-	//
-	// I should probably even rip out the autojoin...
-
-	irc_forward_message_to_plugins (ctx, raw);
-
-	if (!strcasecmp (msg->command, "PING"))
-	{
-		if (msg->params.len)
-			irc_send (ctx, "PONG :%s", msg->params.vector[0]);
-		else
-			irc_send (ctx, "PONG");
-	}
-	else if (!ctx->irc_registered && !strcasecmp (msg->command, "001"))
-	{
-		print_status ("successfully connected");
-		ctx->irc_registered = true;
-
-		const char *autojoin = str_map_find (&ctx->config, "autojoin");
-		if (autojoin)
-			irc_send (ctx, "JOIN :%s", autojoin);
-	}
-	else if (!strcasecmp (msg->command, "PRIVMSG"))
-		process_privmsg (ctx, msg);
-}
-
-enum irc_read_result
-{
-	IRC_READ_OK,                        ///< Some data were read successfully
-	IRC_READ_EOF,                       ///< The server has closed connection
-	IRC_READ_AGAIN,                     ///< No more data at the moment
-	IRC_READ_ERROR                      ///< General connection failure
-};
-
-static enum irc_read_result
-irc_fill_read_buffer_tls (struct bot_context *ctx, struct str *buf)
-{
-	int n_read;
-start:
-	ERR_clear_error ();
-	n_read = SSL_read (ctx->ssl, buf->str + buf->len,
-		buf->alloc - buf->len - 1 /* null byte */);
-
-	const char *error_info = NULL;
-	switch (xssl_get_error (ctx->ssl, n_read, &error_info))
-	{
-	case SSL_ERROR_NONE:
-		buf->str[buf->len += n_read] = '\0';
-		return IRC_READ_OK;
-	case SSL_ERROR_ZERO_RETURN:
-		return IRC_READ_EOF;
-	case SSL_ERROR_WANT_READ:
-		return IRC_READ_AGAIN;
-	case SSL_ERROR_WANT_WRITE:
-	{
-		// Let it finish the handshake as we don't poll for writability;
-		// any errors are to be collected by SSL_read() in the next iteration
-		struct pollfd pfd = { .fd = ctx->irc_fd, .events = POLLOUT };
-		soft_assert (poll (&pfd, 1, 0) > 0);
-		goto start;
-	}
-	case XSSL_ERROR_TRY_AGAIN:
-		goto start;
-	default:
-		print_debug ("%s: %s: %s", __func__, "SSL_read", error_info);
-		return IRC_READ_ERROR;
-	}
-}
-
-static enum irc_read_result
-irc_fill_read_buffer (struct bot_context *ctx, struct str *buf)
-{
-	ssize_t n_read;
-start:
-	n_read = recv (ctx->irc_fd, buf->str + buf->len,
-		buf->alloc - buf->len - 1 /* null byte */, 0);
-
-	if (n_read > 0)
-	{
-		buf->str[buf->len += n_read] = '\0';
-		return IRC_READ_OK;
-	}
-	if (n_read == 0)
-		return IRC_READ_EOF;
-
-	if (errno == EAGAIN)
-		return IRC_READ_AGAIN;
-	if (errno == EINTR)
-		goto start;
-
-	print_debug ("%s: %s: %s", __func__, "recv", strerror (errno));
-	return IRC_READ_ERROR;
-}
-
-static bool irc_connect (struct bot_context *, struct error **);
-static void irc_queue_reconnect (struct bot_context *);
-
-static void
-irc_cancel_timers (struct bot_context *ctx)
-{
-	poller_timer_reset (&ctx->timeout_tmr);
-	poller_timer_reset (&ctx->ping_tmr);
-	poller_timer_reset (&ctx->reconnect_tmr);
-}
-
-static void
-on_irc_reconnect_timeout (void *user_data)
-{
-	struct bot_context *ctx = user_data;
-
-	struct error *e = NULL;
-	if (irc_connect (ctx, &e))
-	{
-		// TODO: inform plugins about the new connection
-		return;
-	}
-
-	print_error ("%s", e->message);
-	error_free (e);
-	irc_queue_reconnect (ctx);
-}
-
-static void
-irc_queue_reconnect (struct bot_context *ctx)
-{
-	hard_assert (ctx->irc_fd == -1);
-	print_status ("trying to reconnect in %ld seconds...",
-		ctx->reconnect_delay);
-	poller_timer_set (&ctx->reconnect_tmr, ctx->reconnect_delay * 1000);
-}
-
-static void
-on_irc_disconnected (struct bot_context *ctx)
-{
-	// Get rid of the dead socket and related things
-	if (ctx->ssl)
-	{
-		SSL_free (ctx->ssl);
-		ctx->ssl = NULL;
-		SSL_CTX_free (ctx->ssl_ctx);
-		ctx->ssl_ctx = NULL;
-	}
-
-	poller_fd_reset (&ctx->irc_event);
-	xclose (ctx->irc_fd);
-	ctx->irc_fd = -1;
-	ctx->irc_registered = false;
-
-	// TODO: inform plugins about the disconnect event
-
-	// All of our timers have lost their meaning now
-	irc_cancel_timers (ctx);
-
-	if (ctx->quitting)
-		try_finish_quit (ctx);
-	else if (!ctx->reconnect)
-		initiate_quit (ctx);
-	else
-		irc_queue_reconnect (ctx);
-}
-
-static void
-on_irc_ping_timeout (void *user_data)
-{
-	struct bot_context *ctx = user_data;
-	print_error ("connection timeout");
-	on_irc_disconnected (ctx);
-}
-
-static void
-on_irc_timeout (void *user_data)
-{
-	// Provoke a response from the server
-	struct bot_context *ctx = user_data;
-	irc_send (ctx, "PING :%s",
-		(char *) str_map_find (&ctx->config, "nickname"));
-}
-
-static void
-irc_reset_connection_timeouts (struct bot_context *ctx)
-{
-	irc_cancel_timers (ctx);
-	poller_timer_set (&ctx->timeout_tmr, 3 * 60 * 1000);
-	poller_timer_set (&ctx->ping_tmr, (3 * 60 + 30) * 1000);
-}
-
-static void
-on_irc_readable (const struct pollfd *fd, struct bot_context *ctx)
-{
-	if (fd->revents & ~(POLLIN | POLLHUP | POLLERR))
-		print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
-
-	(void) set_blocking (ctx->irc_fd, false);
-
-	struct str *buf = &ctx->read_buffer;
-	enum irc_read_result (*fill_buffer)(struct bot_context *, struct str *)
-		= ctx->ssl
-		? irc_fill_read_buffer_tls
-		: irc_fill_read_buffer;
-	bool disconnected = false;
-	while (true)
-	{
-		str_reserve (buf, 512);
-		switch (fill_buffer (ctx, buf))
-		{
-		case IRC_READ_AGAIN:
-			goto end;
-		case IRC_READ_ERROR:
-			print_error ("reading from the IRC server failed");
-			disconnected = true;
-			goto end;
-		case IRC_READ_EOF:
-			print_status ("the IRC server closed the connection");
-			disconnected = true;
-			goto end;
-		case IRC_READ_OK:
-			break;
-		}
-
-		if (buf->len >= (1 << 20))
-		{
-			print_error ("the IRC server seems to spew out data frantically");
-			irc_shutdown (ctx);
-			goto end;
-		}
-	}
-end:
-	(void) set_blocking (ctx->irc_fd, true);
-	irc_process_buffer (buf, irc_process_message, ctx);
-
-	if (disconnected)
-		on_irc_disconnected (ctx);
-	else
-		irc_reset_connection_timeouts (ctx);
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-// The bot is currently mostly synchronous (which also makes it shorter),
-// however our current SOCKS code is not, hence we must wrap it.
-
-struct irc_socks_data
-{
-	struct bot_context *ctx;            ///< Bot context
-	struct poller inner_poller;         ///< Special inner poller
-	bool polling;                       ///< Inner poller is no longer needed
-	struct socks_connector connector;   ///< SOCKS connector
-	bool succeeded;                     ///< Were we successful in connecting?
-};
-
-static void
-irc_on_socks_connected (void *user_data, int socket, const char *hostname)
-{
-	(void) hostname;
-
-	struct irc_socks_data *data = user_data;
-	data->ctx->irc_fd = socket;
-	data->succeeded = true;
-	data->polling = false;
-}
-
-static void
-irc_on_socks_failure (void *user_data)
-{
-	struct irc_socks_data *data = user_data;
-	data->succeeded = false;
-	data->polling = false;
-}
-
-static void
-irc_on_socks_connecting (void *user_data,
-	const char *address, const char *via, const char *version)
-{
-	(void) user_data;
-	print_status ("connecting to %s via %s (%s)...", address, via, version);
-}
-
-static void
-irc_on_socks_error (void *user_data, const char *error)
-{
-	(void) user_data;
-	print_error ("%s: %s", "SOCKS connection failed", error);
-}
-
-static bool
-irc_establish_connection_socks (struct bot_context *ctx,
-	const char *socks_host, const char *socks_port,
-	const char *host, const char *service, struct error **e)
-{
-	struct irc_socks_data data;
-	struct poller *poller = &data.inner_poller;
-	struct socks_connector *connector = &data.connector;
-
-	data.ctx = ctx;
-	poller_init (poller);
-	data.polling = true;
-	socks_connector_init (connector, poller);
-	data.succeeded = false;
-
-	connector->on_connected  = irc_on_socks_connected;
-	connector->on_connecting = irc_on_socks_connecting;
-	connector->on_error      = irc_on_socks_error;
-	connector->on_failure    = irc_on_socks_failure;
-	connector->user_data     = &data;
-
-	if (socks_connector_add_target (connector, host, service, e))
-	{
-		socks_connector_run (connector, socks_host, socks_port,
-			str_map_find (&ctx->config, "socks_username"),
-			str_map_find (&ctx->config, "socks_password"));
-		while (data.polling)
-			poller_run (poller);
-		if (!data.succeeded)
-			error_set (e, "connection failed");
-	}
-
-	socks_connector_free (connector);
-	poller_free (poller);
-	return data.succeeded;
-}
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-static bool
-irc_connect (struct bot_context *ctx, struct error **e)
-{
-	const char *irc_host = str_map_find (&ctx->config, "irc_host");
-	const char *irc_port = str_map_find (&ctx->config, "irc_port");
-	const char *socks_host = str_map_find (&ctx->config, "socks_host");
-	const char *socks_port = str_map_find (&ctx->config, "socks_port");
-
-	const char *nickname = str_map_find (&ctx->config, "nickname");
-	const char *username = str_map_find (&ctx->config, "username");
-	const char *realname = str_map_find (&ctx->config, "realname");
-
-	// We have a default value for these
-	hard_assert (irc_port && socks_port);
-	hard_assert (nickname && username && realname);
-
-	// TODO: again, get rid of `struct error' in here.  The question is: how
-	//   do we tell our caller that he should not try to reconnect?
-	if (!irc_host)
-		return error_set (e, "no hostname specified in configuration");
-
-	bool use_tls;
-	if (!irc_get_boolean_from_config (ctx, "tls", &use_tls, e))
-		return false;
-
-	bool connected = socks_host
-		? irc_establish_connection_socks (ctx,
-			socks_host, socks_port, irc_host, irc_port, e)
-		: irc_establish_connection (ctx, irc_host, irc_port, e);
-	if (!connected)
-		return false;
-
-	if (use_tls && !irc_initialize_tls (ctx, e))
-	{
-		xclose (ctx->irc_fd);
-		ctx->irc_fd = -1;
-		return false;
-	}
-	print_status ("connection established");
-
-	ctx->irc_event = poller_fd_make (&ctx->poller, ctx->irc_fd);
-	ctx->irc_event.dispatcher = (poller_fd_fn) on_irc_readable;
-	ctx->irc_event.user_data = ctx;
-
-	// TODO: in exec try: 1/ set blocking, 2/ setsockopt() SO_LINGER,
-	//   (struct linger) { .l_onoff = true; .l_linger = 1 /* 1s should do */; }
-	//   3/ /* O_CLOEXEC */  But only if the QUIT message proves unreliable.
-	poller_fd_set (&ctx->irc_event, POLLIN);
-	irc_reset_connection_timeouts (ctx);
-
-	irc_send (ctx, "NICK %s", nickname);
-	irc_send (ctx, "USER %s 8 * :%s", username, realname);
-	return true;
-}
-
-static bool
-parse_config (struct bot_context *ctx, struct error **e)
-{
-	if (!irc_get_boolean_from_config (ctx, "reconnect", &ctx->reconnect, e))
-		return false;
-
-	const char *delay_str = str_map_find (&ctx->config, "reconnect_delay");
-	hard_assert (delay_str != NULL);  // We have a default value for this
-	if (!xstrtoul (&ctx->reconnect_delay, delay_str, 10))
-	{
-		return error_set (e,
-			"invalid configuration value for `%s'", "reconnect_delay");
-	}
-
-	hard_assert (!ctx->admin_re);
-	const char *admin = str_map_find (&ctx->config, "admin");
-	if (!admin)
-		return true;
-
-	struct error *error = NULL;
-	ctx->admin_re = regex_compile (admin, REG_EXTENDED | REG_NOSUB, &error);
-	if (!error)
-		return true;
-
-	error_set (e, "invalid configuration value for `%s': %s",
-		"admin", error->message);
-	error_free (error);
-	return false;
-}
-
-static void
-on_plugin_death (struct plugin *plugin, int status)
-{
-	struct bot_context *ctx = plugin->ctx;
-
-	// TODO: callbacks on children death, so that we may tell the user
-	//       "plugin `name' died like a dirty jewish pig"; use `status'
-	if (!plugin->is_zombie && WIFSIGNALED (status))
-	{
-		const char *notes = "";
-#ifdef WCOREDUMP
-		if (WCOREDUMP (status))
-			notes = " (core dumped)";
-#endif
-		print_warning ("Plugin `%s' died from signal %d%s",
-			plugin->name, WTERMSIG (status), notes);
-	}
-
-	// Let's go through the zombie state to simplify things a bit
-	// TODO: might not be a completely bad idea to restart the plugin
-	plugin_zombify (plugin);
-
-	plugin->pid = -1;
-
-	// In theory we could close `read_fd', set `read_event->closed' to true
-	// and expect epoll to no longer return events for the descriptor, as
-	// all the pipe ends should be closed by then (the child is dead, so its
-	// pipe FDs have been closed [assuming it hasn't forked without closing
-	// the descriptors, which would be evil], and we would have closed all
-	// of our FDs for this pipe as well).  In practice that doesn't work.
-	poller_fd_reset (&plugin->read_event);
-
-	xclose (plugin->read_fd);
-	plugin->read_fd = -1;
-
-	LIST_UNLINK (ctx->plugins, plugin);
-	plugin_destroy (plugin);
-
-	// Living child processes block us from quitting
-	try_finish_quit (ctx);
-}
-
-static bool
-try_reap_plugin (struct bot_context *ctx)
-{
-	int status;
-	pid_t zombie = waitpid (-1, &status, WNOHANG);
-
-	if (zombie == -1)
-	{
-		// No children to wait on
-		if (errno == ECHILD)
-			return false;
-
-		hard_assert (errno == EINTR);
-		return true;
-	}
-
-	if (zombie == 0)
-		return false;
-
-	struct plugin *plugin = plugin_find_by_pid (ctx, zombie);
-	// XXX: re-exec if something has died that we don't recognize?
-	if (soft_assert (plugin != NULL))
-		on_plugin_death (plugin, status);
-	return true;
-}
-
-static void
-kill_all_zombies (struct bot_context *ctx)
-{
-	for (struct plugin *plugin = ctx->plugins; plugin; plugin = plugin->next)
-	{
-		if (!plugin->is_zombie)
-			continue;
-
-		print_status ("forcefully killing a zombie of `%s' (PID %d)",
-			plugin->name, (int) plugin->pid);
-		kill (plugin->pid, SIGKILL);
-	}
-}
-
-static void
-on_signal_pipe_readable (const struct pollfd *fd, struct bot_context *ctx)
-{
-	char dummy;
-	(void) read (fd->fd, &dummy, 1);
-
-	if (g_termination_requested)
-	{
-		g_termination_requested = false;
-		if (!ctx->quitting)
-		{
-			// There may be a timer set to reconnect to the server
-			irc_cancel_timers (ctx);
-
-			if (ctx->irc_fd != -1)
-				irc_send (ctx, "QUIT :Terminated by signal");
-			initiate_quit (ctx);
-		}
-		else
-			// Disregard proper termination, just kill all the children
-			kill_all_zombies (ctx);
-	}
-
-	// Reap all dead children (since the signal pipe may overflow etc. we run
-	// waitpid() in a loop to return all the zombies it knows about).
-	while (try_reap_plugin (ctx))
-		;
-}
-
-int
-main (int argc, char *argv[])
-{
-	g_original_argv = strv_make ();
-	strv_append_vector (&g_original_argv, argv);
-
-	static const struct opt opts[] =
-	{
-		{ 'd', "debug", NULL, 0, "run in debug mode" },
-		{ 'h', "help", NULL, 0, "display this help and exit" },
-		{ 'V', "version", NULL, 0, "output version information and exit" },
-		{ 'w', "write-default-cfg", "FILENAME",
-		  OPT_OPTIONAL_ARG | OPT_LONG_ONLY,
-		  "write a default configuration file and exit" },
-		{ 0, NULL, NULL, 0, NULL }
-	};
-
-	struct opt_handler oh =
-		opt_handler_make (argc, argv, opts, NULL, "Modular IRC bot.");
-
-	int c;
-	while ((c = opt_handler_get (&oh)) != -1)
-	switch (c)
-	{
-	case 'd':
-		g_debug_mode = true;
-		break;
-	case 'h':
-		opt_handler_usage (&oh, stdout);
-		exit (EXIT_SUCCESS);
-	case 'V':
-		printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
-		exit (EXIT_SUCCESS);
-	case 'w':
-		call_simple_config_write_default (optarg, g_config_table);
-		exit (EXIT_SUCCESS);
-	default:
-		print_error ("wrong options");
-		opt_handler_usage (&oh, stderr);
-		exit (EXIT_FAILURE);
-	}
-
-	opt_handler_free (&oh);
-
-	print_status (PROGRAM_NAME " " PROGRAM_VERSION " starting");
-	setup_signal_handlers ();
-	init_openssl ();
-
-	struct bot_context ctx;
-	bot_context_init (&ctx);
-
-	struct error *e = NULL;
-	if (!simple_config_update_from_file (&ctx.config, &e)
-	 || !setup_recovery_handler (&ctx, &e))
-	{
-		print_error ("%s", e->message);
-		error_free (e);
-		exit (EXIT_FAILURE);
-	}
-
-	ctx.signal_event = poller_fd_make (&ctx.poller, g_signal_pipe[0]);
-	ctx.signal_event.dispatcher = (poller_fd_fn) on_signal_pipe_readable;
-	ctx.signal_event.user_data = &ctx;
-	poller_fd_set (&ctx.signal_event, POLLIN);
-
-#if OpenBSD >= 201605
-	// cpath is for creating the plugin home directory
-	if (pledge ("stdio rpath cpath inet proc exec", NULL))
-		exit_fatal ("%s: %s", "pledge", strerror (errno));
-#endif
-
-	plugin_load_all_from_config (&ctx);
-	if (!parse_config (&ctx, &e)
-	 || !irc_connect (&ctx, &e))
-	{
-		print_error ("%s", e->message);
-		error_free (e);
-		exit (EXIT_FAILURE);
-	}
-
-	// TODO: clean re-exec support; to save the state I can either use argv,
-	//   argp, or I can create a temporary file, unlink it and use the FD
-	//   (mkstemp() on a `struct str' constructed from XDG_RUNTIME_DIR, TMPDIR
-	//   or /tmp as a last resort + PROGRAM_NAME + ".XXXXXX" -> unlink();
-	//   remember to use O_CREAT | O_EXCL).  The state needs to be versioned.
-	//   Unfortunately I cannot de/serialize SSL state.
-
-	ctx.polling = true;
-	while (ctx.polling)
-		poller_run (&ctx.poller);
-
-	bot_context_free (&ctx);
-	strv_free (&g_original_argv);
-	return EXIT_SUCCESS;
-}
-